Another Antitrust Bust

American Express gets vindication at the Supreme Court.

Hide the sharp objects at the Antitrust Division of the Justice Department. For the second time this month, the trust busters have received a sharp rebuke from the judiciary. On Monday the Supreme Court delivered the embarrassing lesson by rejecting a dubious antitrust case against American Express.

The government’s antitrust lawyers must be underemployed because they keep trying to invent violations that don’t exist. In Ohio v. American Express, the feds and 17 states claimed that Amex’s “anti-steering” contract provisions...